PHASE CHANGES
This is the process where liquid water changes into water vapor.
What is evaporation?
This is the amount of water vapor in the air.
What is humidity?
These are flat, layered clouds that often cover the sky.
What are stratus clouds?
This is a cloud that forms at Earth’s surface.
What is fog?
This is liquid precipitation.
What is rain?
This type of energy is absorbed or released during a phase change.
What is latent heat?
This is the temperature at which air becomes saturated.
What is the dew point?
These puffy clouds resemble cotton balls.
What are cumulus clouds?
This type of fog forms when the ground cools at night.
What is radiation fog?
These clear ice pellets form when rain freezes before reaching the ground.
What is sleet?
This process changes water vapor directly into liquid droplets.
What is condensation?
This type of humidity is expressed as a percentage.
What is relative humidity?
These thin, wispy clouds form above 6,000 meters.
What are cirrus clouds?
This type of fog forms when warm air moves over a cold surface.
What is advection fog?
This solid precipitation forms in layers inside strong updrafts.
What is hail?
This process changes ice directly into water vapor.
What is sublimation?
This type of humidity is measured as mass per volume of air.
What is absolute humidity?
This towering cloud produces thunderstorms, lightning, and hail.
What is a cumulonimbus cloud?
This process occurs when air is forced up a mountain slope and cools.
What is lifting? (Also acceptable: What is upslope?)
This process occurs when small droplets combine to form larger drops.
What is coalescence?
This type of cooling occurs when air rises and expands.
What is adiabatic cooling?
When air temperature decreases but moisture stays constant, this increases.
What is relative humidity?
These tiny particles provide surfaces for water vapor to condense on.
What are condensation nuclei?
This shallow fog forms when cold air moves over warmer water.
What is steam fog?
This process involves water being cooled below freezing without freezing.
What is supercooling?